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Operational news

On this page you will find the latest news and announcements relating to gas operational data. Please refer to this page for more about data changes, outages, and discrepancies.

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Successful implementation of EU Phase 4a Transparency changes

Dear Colleague

We are pleased to confirm the successful implementation of EU Phase 4a Transparency changes. These are summarised as follows:

  • Publication of Reserve Prices for KWh/day for Interconnection Points
  • Publication of charge for what it costs to flow 1 GWh/day/year for each Interconnection Point
  • Information to be published before the tariff period on the NG Webpage

 User Guidance was emailed to the shipper community on the 30th of November.  Please email: [email protected] with any queries.
 

Kind regards
EU Gas Regulatory Change Programme, National Grid

 

 

Dear all

For awareness only - the last release within the EU Phase 4a project comprises some changes to the ENTSOG Transparency Platform and the publication of data on the National Grid Website which are due for go live tomorrow 1st December 2017. The changes are necessary for us to meet our legal obligations but they are of low impact and we don’t anticipate many queries. We are pleased to confirm that these changes are already live and include:

  • Publication of Reserve Prices for KWh/day for Interconnection Points

  • Publication of charge for what it costs to flow 1 GWh/day/year for each Interconnection Point

  • Information to be published before the tariff period on the NG Webpage

    These changes have been communicated during the last few months to the gas shipper community through the Gas Ops Forum and Transmission Workgroup. Please find enclosed User Guidance detailing the changes, just in case you get any queries. The guidance is being circulated via email to the gas shippers this afternoon.

    Please do get in touch if you have any queries.

    Kind regards, Sarah

 

System Outage

20/11/2017

Please be aware that there will be a  system outage taking place on 21st Nov 2017 (between 16:15- 18:15) affecting the MIPI web service . This will affect the following reports:

-  AggregatePhysical NTS System Entry Flows (NTSAPF)
-  End Of Day Aggregate Forecast NTS System Entry Flows (NTSAFF)
-  System Status Information (NB92)
-  Calorific Value Report.
-  PDWS hourly physical flow data

-Linepack swing report will also be affected.

 Normal service should resume shortly after. We will provide regular updates   following this outage. If you have any further questions please contact us on box. [email protected]

Clock Change

25/10/2017

 The Gemini Clock change from British Summer Time (BST) to Greenwich Mean Time (GMT) will be carried out on Sunday 29th October 2017.

The Gemini system will not change to GMT until 04:30 BST (03:30 GMT) on Sunday 29th October, the normal housekeeping slot will commence as per current BST time.

Please be aware that the system clocks will remain in BST until 04:30 and the system will close for housekeeping as normal at 03.00 BST. The systems will then return at the times given below.

Gemini Timetable (system times):

Start of outage:                Sunday 29/10/17 at 03:00 BST (02:00 GMT)

End of outage:                 Sunday 29/10/17 to 05:00 GMT

Duration:                         Net outage - 3 elapsed hours
 

MIPI Outage 24th October 2017

23/10/2017

Please be aware that there will be a full system outage taking place on 24th October 2017 (between 07:00- 09:00)  and reports will be unavailable. 

Normal service will resume after this period and all missing data will be patched.

If you have any further questions please contact us on [email protected]

Calculated Linepack Utilisation

29/09/2017

You may be aware that there has been discussion with the Gas Operational Forum with regards to pressure fluctuations experienced by our customers on the NTS. We have articulated to customers why these pressure fluctuations occur and why National Grid needs to utilise these full range of allowed pressure tolerances to meet both the supply and demand profile of all of our customers on the NTS.

One area of discussion has been around what further information/indication that National Grid can provide to assist customers in managing operational requirements.  As part of this, we are trialling a  publication of a daily linepack (difference between NTS supply and demand) notification. This report is intended to help give an indication of what the linepack may be at the lowest point in the day, this will be available from

 2nd October 2017 (https://www.nationalgrid.com/uk/gas/market-and-operations/transmission-operational-data). Where there is a large reduction in linepack, customers may experience reduced pressures around that point in time.

This report is based on hourly physical supply and demand flow notifications received from NTS connected sites and latest linepack of the Gas Day. The following points of caution should be noted.

- It is important to note that the physical notifications which will indicate a change to linepack are changed continually throughout the day by connected parties and therefore linepack anticipated at the start of the day may be very different to the linepack seen later in the day. The report will be published at three key points within the gas day (06:00, 12:30 and 18:30) based on the latest information. 

- It should also be noted that a large reduction in national NTS  linepack does not mean all customers will experience reduced pressures. Locally, pressure can be significantly affected by the action of large locally connected sites and this can distort the effect of the national level linepack changes. 

- Potential actions taken by customers in response to this report may in itself change the linepack experienced. This  report is not able to inform customers what the linepack will be at a particular point in time; it indicates what the linepack would be based on the information we’ve received at that point in time. 

- We will be seeking feedback from customer on how useful this report is, and we are continuing to work with customers to explore information that may help meet customer’s needs. 

Calculated Linepack Utilisation

29/09/2017

You may be aware that there has been discussion with the Gas Operational Forum with regards to pressure fluctuations experienced by our customers on the NTS. We have articulated to customers why these pressure fluctuations occur and why National Grid needs to utilise these full range of allowed pressure tolerances to meet both the supply and demand profile of all of our customers on the NTS.

One area of discussion has been around what further information/indication that National Grid can provide to assist customers in managing operational requirements.  As part of this, we are trialling a  publication of a daily linepack (difference between NTS supply and demand) notification. This report is intended to help give an indication of what the linepack may be at the lowest point in the day, this will be available from

 2nd October 2017 (http://www2.nationalgrid.com/UK/Industry-information/Gas-transmission-operational-data/Supplementary-Reports/). Where there is a large reduction in linepack, customers may experience reduced pressures around that point in time.

This report is based on hourly physical supply and demand flow notifications received from NTS connected sites and latest linepack of the Gas Day. The following points of caution should be noted.

- It is important to note that the physical notifications which will indicate a change to linepack are changed continually throughout the day by connected parties and therefore linepack anticipated at the start of the day may be very different to the linepack seen later in the day. The report will be published at three key points within the gas day (06:00, 12:30 and 18:30) based on the latest information. 

- It should also be noted that a large reduction in national NTS  linepack does not mean all customers will experience reduced pressures. Locally, pressure can be significantly affected by the action of large locally connected sites and this can distort the effect of the national level linepack changes. 

- Potential actions taken by customers in response to this report may in itself change the linepack experienced. This  report is not able to inform customers what the linepack will be at a particular point in time; it indicates what the linepack would be based on the information we’ve received at that point in time. 

- We will be seeking feedback from customer on how useful this report is, and we are continuing to work with customers to explore information that may help meet customer’s needs. 

2017 Winter Webinars

29/09/2017

National Grid are pleased to announce that the 2017 Winter Webinars are now LIVE!

This year’s suite includes the following topics:

Gas System Pressures and Operational Tools

Recap summary of what affects NTS pressure

What has changed recently

What information is available from National Grid

What further information is being explored to help with pressure issues

Daily Agreed Gas Pressures Process & Operating Margins

Emergency Exercise

NEC background

Gas Deficit Emergency Stages and Actions

Information on Exercise Yield

Locational Trades/ Constraint Management

Description of what Locational Energy Actions are

How National Grid communicates in the event of a Locational Action being carried out

A working example

REMIT Platform

Overview of GB Remit Policy

Navigating round the platform, including how to post an urgent market message

SO Key Documents

Documents covered: Winter Outlook/Review & Consultation + Gas Ten Year Statement/Future Operability Planning + Future Energy Scenarios

Content includes where the documents are published, how often they are published and what information they include for

MIPI – Common Queries

To include top 10 MIPI queries, including:

Storage & LNG report – discrepancy in figures

APIs – how to register

CV missing data

Actual offtake flows – missing data

Gas Operational Forum

Summary of general topics covered

Who attends?

Promote the changing nature of the forums – more interactive

Pre-Emergency Notifications

Gas margins/deficit warnings

Safety monitors

All such webinars have been pre-recorded for your operational convenience and have since been uploaded to the following webpage:

https://www.nationalgrid.com/uk/gas/market-and-operations/transmission-operational-data

We hope you find the webinars informative and useful and should you have any questions in relation to any of the published content, please do not hesitate to contact the Operational Liaison team at [email protected] who will be able to put you in touch with the appropriate subject matter expert.    

2017 Winter Webinars

29/09/2017

National Grid are pleased to announce that the 2017 Winter Webinars are now LIVE!

This year’s suite includes the following topics:

Gas System Pressures and Operational Tools

Recap summary of what affects NTS pressure

What has changed recently

What information is available from National Grid

What further information is being explored to help with pressure issues

Daily Agreed Gas Pressures Process & Operating Margins

Emergency Exercise

NEC background

Gas Deficit Emergency Stages and Actions

Information on Exercise Yield

Locational Trades/ Constraint Management

Description of what Locational Energy Actions are

How National Grid communicates in the event of a Locational Action being carried out

A working example

REMIT Platform

Overview of GB Remit Policy

Navigating round the platform, including how to post an urgent market message

SO Key Documents

Documents covered: Winter Outlook/Review & Consultation + Gas Ten Year Statement/Future Operability Planning + Future Energy Scenarios

Content includes where the documents are published, how often they are published and what information they include for

MIPI – Common Queries

To include top 10 MIPI queries, including:

Storage & LNG report – discrepancy in figures

APIs – how to register

CV missing data

Actual offtake flows – missing data

Gas Operational Forum

Summary of general topics covered

Who attends?

Promote the changing nature of the forums – more interactive

Pre-Emergency Notifications

Gas margins/deficit warnings

Safety monitors

All such webinars have been pre-recorded for your operational convenience and have since been uploaded to the following webpage:

http://www2.nationalgrid.com/UK/Industry-information/Gas-transmission-operational-data/Webinars/

We hope you find the webinars informative and useful and should you have any questions in relation to any of the published content, please do not hesitate to contact the Operational Liaison team at [email protected] who will be able to put you in touch with the appropriate subject matter expert.

MIPI Outage

29/09/2017

Please be aware there will be some system maintenance taking place on Saturday 30th September between the hours of 07:30 to 17:00 UKT. The MIPI and GMRS web URL’s will be accessible but it will not reflect the latest data during this outage window. Both systems will resume back to normal shortly after this outage.

If you have any further questions please contact us on [email protected]

MIPI Outage

18 Sep 2017

Please be aware that there will be a full system outage taking place on 20th September 2017 (between 16:15 – 23:00) affecting the following reports:

  • NTSAFF-Aggregate Forecast Flows into the NTS
  • NTSAPF-Aggregate Physical Flows into the NTS
  • NB92-System Status Information (this will be published via ANS messaging)

Normal service will resume after 23:15 and the respective data will be patched in.

We will provide further updates.

If you have any further questions please contact us on [email protected].

MIPI Outage

13/09/2017

Please be aware that there will be a full system outage taking place on 13th September 2017 (between 16:15 – 23:00) affecting the following reports:

NTSAFF-Aggregate Forecast Flows into the NTS

NTSAPF-Aggregate Physical Flows into the NTS

NB92-System Status Information (this will be published via ANS messaging)

Normal service will resume after 23:30 and the respective data will be patched in.

We will provide further updates

If you have any further questions please contact us on [email protected]

MIPI data issues

04/09/2017

The issue that caused data inconsistencies on MIPI on Friday 1 September were resolved at midnight on the same day. There are some remaining data anomalies specifically around Flow Weighted averages for the end of day CV’s within the Calorific value report in Data Item and the Energy Daily report within the Report Explorer page.  These values are currently in the process of being corrected and will be available as soon as possible. For all other reports, all data is available for 1 September Gas Day.

We will provide a further update this week.

Apologies for the inconvenience caused.

For further queries please contact us on [email protected] / 01926656474

MIPI Data Issues

01/09/2017

Please be advised that data issues are currently being experienced that may impact data items within MIPI and the Gemini application. We are working on the issue and apologise for any inconvenience caused.  Access to Gemini will remain unaffected.

Next update at 15:00. 

For more information Please contact us at [email protected]

MIPI Storage Stock Issue

25/08/2017

National Grid are aware of a current issue with reporting storage stock data via the MIPI publication.  We are working on this issue currently and will provide a further update when a solution is identified.

We apologise for any inconvenience caused, for any urgent queries please contact:

[email protected] or 01926 656474

Consultation on potential operating margins incentive

17/08/2017

We are consulting on the potential re-introduction of a financial incentive for Operating Margin’s costs. These proposals are designed to help ensure that the costs customers pay for Operating Margins are kept to a minimum.

In May we sought views on whether our customers support the general principle that, as with other pass-through costs, Operating Margins costs should be subject to a financial incentive. We would now very much welcome your view on whether you feel the scheme parameters that we have proposed to Ofgem represent fair balance of risk and reward sharing between customers and National Grid.

Your views will be passed to Ofgem who will consider these when developing their thinking on this matter.

Please use this link to view the document; it sets out our rationale for incentivising Operating Margins, our proposed scheme and contains background information. We would be very happy to discuss this further with anyone who may be interested to do so.

We would appreciate responses by 8 September. (However, if you would like to respond but are unable to do so by then for any reason please let us know.) We would be happy to discuss these proposals further if you would like further information.

UK Link disaster recovery

16/08/2017

Xoserve will be conducting the 2017 UK Link disaster recovery test on Friday 18th, Saturday 19th and Sunday 20th of   August as part of our annual programme of Disaster Recovery and resilience testing.

There will be a service MIPI outage during the following times:   

No new forecast weather in MIPI at 23:00 UK BST on Friday for gas days Friday 18th and Saturday 19th

No new forecast weather in MIPI at 08:00 UK BST on Saturday 19th August for that gas day

No new forecast weather in MIPI at 23:00 UK BST on Saturday for gas days Saturday 19th and Sunday 20th

There will be a delay in the publication of actual weather data for gas day Friday 18th August in MIPI, this data will be published late morning on the 19th August.

Normal service should resume after this period. 

If you have any further questions please contact us on [email protected]

Update EU Gas Regulatory Change

15/08/2017

The first release of the 2017 EU Gas Regulatory Change programme went live on Sunday after a successful implementation. 

Any Gemini system issues should be reported to the Xoserve Gemini Service Desk on 0845 600 0506.

Please email [email protected] for any other queries regarding these changes.   

Please continue to use your usual contact routes for any operational day to day issues.

MIPI maintenance activity

11/08/2017

Please be aware there will be a system outage taking place intermittently on Saturday 12th August 2017. We do not expect MIPI to be impacted during the maintenance activity, however there is a possibility that the instantaneous flows page will not be available during 09:00 – 14:30.

If you have any further questions please contact us on [email protected]

Update EU Gas Regulatory Change

11/08/2017

The next stage of EU Gas Regulatory Change goes live this Sunday 13th August with some changes to Gemini, addressing the requirements of CAM Code Amendments and some operational improvements. 

The changes include:

  • Four auctions for IP Quarterly Capacity replaces one auction
  • IP Annual Yearly Auction is moving from March to July 2018
  • Two new reports a)Entitlement versus Energy Allocation Report b)Utilisation Monitoring Report
  • Functionality for Negative Implied Flow Rates (Bacton IP only)  

Guidance has been circulated to the shipper community this week.

The Gemini implementation is due to take place during the planned Gemini Maintenance Window (3.00 – 5.00).

Any Gemini system issues should be reported to the Xoserve Gemini Service Desk on 0845 600 0506.

Please email [email protected] for any other queries regarding these changes.   

Please continue to use your usual contact routes for any operational day to day issues.

Update EU Gas Regulatory Change

4 August 2017

The next stage of EU Gas Regulatory Change goes live on the 13th August with some changes to Gemini, addressing the requirements of CAM Code Amendments and some operational improvements. 

The changes include:

  • Four auctions for IP Quarterly Capacity replaces one auction
  • IP Annual Yearly Auction is moving from March to July
  • Two new reports a)Entitlement versus Energy Allocation Report b)Utilisation Monitoring Report
  • Functionality for Negative Implied Flow Rates (Bacton IP only)  

The Gemini implementation is due to take place during the planned Gemini Maintenance Window (3.00 – 5.00).

Any Gemini system issues should be reported to the Xoserve Gemini Service Desk on 0845 600 0506.

Please email [email protected] for any other queries regarding these changes.   

Please continue to use your usual contact routes for any operational day to day issues.

MIPI maintenance activity

4 August 2017

Please be aware that there will be a system outage taking place intermittently on Saturday 5th August 2017 (between 09:00 – 14:30) affecting the whole MIPI web service. 

Please note that all reports will be affected.

Normal service will resume at 14:30.

If you have any further questions please contact us on [email protected].

MIPI outage 28.7.17

27 July 2017

Please be aware that there will be a system outage taking place on 28th June 2017 (between 05:00 - 05:30) affecting the whole MIPI web service. 

All reports will be affected.

Normal service will resume at 05:30 am.

If you have any further questions please contact us on [email protected]

System outage affecting MIPI

25 July 2017

Please be aware that there will be a system outage taking place on 27th June 2017 (between 16:00 - 23:00) affecting the MIPI web service. This will affect the following reports:

  • AggregatePhysical NTS System Entry Flows (NTSAPF)
  • End Of Day Aggregate Forecast NTS System Entry Flows (NTSAFF)
  • System Status Information (NB92)
  • Calorific Value Report.
  • PDWS hourly physical flow data

Normal service should resume shortly after. We will provide regular updates following this outage. If you have any further questions please contact us on [email protected]

CWV data update

10 July 2017

Please note the CWV values in MIPI have now been amended for Gas days 1st, 10th, 11th and 12th June. Apologies for the inconvenience caused. 

System outage affecting MIPI

27 June 2017

Please be aware that there will be a system outage taking place on 27th June 2017 (between 16:00 - 23:00) affecting the MIPI web service. This will affect the following reports:

  • NTSAFF-Aggregate Forecast Flows into the NTS.

  • NTSAPF-Aggregate Physical Flows into the NTS.

  • NB92-System Status Information.  

  • GRMS (Instantaneous flows)

Normal service should resume shortly after. We will provide regular updates following this outage. If you have any further questions please contact us on [email protected].

Instantaneous flows- update

1 June 2017

The issue with the instantaneous flows data has now been resolved. Thank you for your patience.

Instantaneous flows issue

1 June 2017

We are aware of the issue with the instantaneous flows page not updating since 7:45pm last night. We are investigating this issue and hope to get it resolved as soon as possible. We will keep you informed of progress.

Gemini outage

25 May 2017

A Gemini outage of 2 hours will take place on 31st May 2017 between 04:15 and 06:15.

If you have any queries,  please contact us [email protected].

MIPI data discrepancies

17 May 2017

Please be aware we have identified small data discrepancies with the MIPI (SISR04) D+6 Actual Demand for the following days:

  • 27/02/17.

  • 28/02/17.

  • 01/03/17.

  • 08/03/17.

  • 09/03/17.

  • 24/03/17.

  • 26/03/17.

  • 27/03/17.

  • 28/03/17.

This has now been rectified we apologize for any inconvenience caused.

Storage stock level information

12 May 2017

Please be aware that we have been experiencing an issue with the provision of the Storage stock information and NTS Shrinkage Data to MIPI.

We have been working hard to understand the root cause of this issue and have a temporary solution in place from today and as such we expect this information will be available from Gas Day 12 May 2017. A solution to fully address the root cause will be implemented as soon as possible.

If you have any queries on this please contact [email protected].

MIPI data inconsistencies update

12 May 2017

On 30 July 2016 National Grid Transmission successfully implemented the Gas Control Suite (GCS) which replaced an aging control system with a more flexible solution to meet the new challenges of managing the network.  This also provided the following capabilities:

Physical control of the UK bulk gas transmission network.

Higher reliability, more secure system with next generation operator user interfaces (first total makeover since 1990s)

Commercial UK gas market facilitation and operation.

Flexible solution that can rapidly be adapted to regulatory or market change with state of the art easy access data visualisation.

Following GCS there were some inconsistencies in the data that was reflected in MIPI/GMRS.

The project team have been working hard to resolve the outstanding issues and as such we sent a communication on 31 March 2017 to highlight that these should be resolved by the end May 2017.  A progress update can be summarised as follows:

Demand actual data D+1 (SISR04 and Data Item Explorer)

This data has been consistently available since 03/11/17

Since GCS implementation, however,  there have been some inconsistencies with this data and therefore all existing D+1 data was deleted between 29/07/16 until 02/11/16.  This data will not be retrospectively added back into MIPI as the more accurate D+6 data is available.

Demand actual data D+6 (SISR04 and Data Item Explorer)

All data for the missing period between 23/07/16 and 11/02/17 has now been retrospectively added back into MIPI ahead of the forecasted completion date.

Weather Data (Operational Summary Report)

The weather data item within this daily report has not been available since GCS implementation.  From 26 May 2017 this specific data item will be published within the daily reports.  The aim was to have the retrospective patching of missing data completed by the end of May 2017, however priority was given to ensure the D+6 data was available sooner.  The retrospective weather data will now be available by 23 June 2017.

Demand data update

11 May 2017

As you will be aware on 30July 2016 National Grid Transmission successfully implemented the Gas Control Suite (GCS) which replaced an aging control system with a much more flexible control system to meet the new challenges of managing the network.  This also provided the following capabilities:

Physical control of the UK bulk gas transmission network. Higher reliability, more secure system with next generation operator user interfaces ( first total makeover since 1990s)

Commercial UK gas market facilitation and operation. Flexible solution that can rapidly be adapted to regulatory or market change with state of the art easy access data visualisation.

Following GCS there were some data inconsistencies in the data that was reflected in MIPI/GMRS, most of which have been resolved.

A few remaining issues exist which the project team have been working hard to resolve.  These will be resolved by the end May 2017.  The outstanding issues can be summarised as follows:

Demand actual data D+1 (SISR04 and Data Item Explorer)

This data has been consistently available since 03/11/17

Since GCS implementation there have been some data inconsistencies with this data and therefore all existing D+1 data has been deleted since 29/07/16 until 02/11/16.  This data will not be retrospectively added back into MIPI as the more accurate D+6 data is available.

Demand actual data D+6 (SISR04 and Data Item Explorer)

All data is correct since 12/02/17.

The historic data has not been available in MIPI from 23/07/16 until 11/02/17.  All data for this period will be retrospectively added back into MIPI by mid-May 2017. News items will be posted onto MIPI as this progresses.

Weather Data (Operational Summary Report)

The weather data item within this daily report has not been available since GCS implementation.  From mid-May 2017 this data item will be published and hence the report will be complete from that point onwards.  The retrospective patching of missing data will commence as soon as possible and we aim to have this completed by the end of May 2017.

Capacity Availability (NORD07)

An issue has been identified with this report and we are working to understand the root cause of this issue.

Procurement guidelines 2016-2017

28 April 2017

Please be aware that the Procurement Guidelines Report covering the period 1st April 2016 to 31st March 2017 is now available on the Procurement and System Management Documents page [link].

Prevailing View - GDW/MN values

6 April 2017

As you may be aware as a result of March 2017 Clock Change activities, there is slight delay in the GDW and MN Trigger values displaying on time. For each Gas Day the value for ‘Tomorrow’ should move over to the value for ‘Today’ as of 05:00. However, there is a delay with this information moving across where the values are moving over at 06:15 in the first instance. Going forward there is a fix for the system currently planned for 14th April 2017.

We would like to thank everyone for their patience in resolving this issue.

Please contact the e-mail address below if you have any further queries: [email protected]